>> Also, I read somewhere recently that Neanderthal Man and Cro-Magnon
>> man (H. sapiens) overlapped? The Neandertal traits in archaic
>> H.sapiens would perhaps be evidence of that, ie. interbreeding?
Yes, they are thought to have lived simultaneously in the Middle East
for over 50,000 years. If they were able to do this and still maintain
their differences, it would count as evidence for their being different
species. Another alternative is that although they were found in the
same region, they were migrating in and out at different times, and thus
never had much contact with each other.
Some scientists (I think this is a minority view) have maintained that
there *is* evidence for the intermediate forms that would be expected if
they were living side by side and interbreeding. I don't know which
fossils they consider as evidence of this, though.
The Neandertal traits in some archaic H.sapiens are more usually
considered to be evidence of something evolving towards Neandertal-ness,
rather than of interbreeding.
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